How to model a burger package with beveled edges?
In reality, the paper bends to hold the box closed.
In 3D no bending occurs, the paper clips through instead.

Some pointers for modeling:

Model only one half and use Mirror Modifier to generate the other
Use Solidify Modifier to add thickness
Make use of Pivot points when rotating (Active element works well)
Use Custom orientations to rotate angled parts

Using Pivot Point &gt; Active Element to rotate around selected vertex.

Using a Custom orientation to rotate an angled flap.